The Siemens SENTRON 5SL4501-6 is a 1P+N miniature circuit breaker (MCB) with a B tripping characteristic, rated 1 A at 230 V AC. It interrupts fault currents up to 10 kA per EN 60898 and IEC 60947-2 — enough for residential or light commercial distribution boards where the prospective short-circuit current stays under that ceiling. At 1 A it protects a small branch or a single device, not a motor feeder. The 1P+N pole configuration switches the phase and disconnects the neutral, which is standard for single-phase final circuits in most European-style panels. Depth is 76 mm (70 mm installation depth).
The 10 kA breaking capacity (both EN 60898 and IEC 60947-2) means this MCB can safely clear a fault up to 10 kA without welding its contacts or rupturing the case — critical for panels where the supply transformer is close and the fault level is high. Temperature derating is built in: at 30 °C it carries the full 1 A; at 55 °C it derates to 0.9 A. If the panel runs hot, account for that when sizing the branch. Halogen-free and silicon-free construction, sealable, and touch-protected terminals — meets the material and safety requirements for public buildings and infrastructure projects.